US 2999265 A
Resumen disponible en
Reclamaciones disponible en
Descripción (El texto procesado por OCR puede contener errores)
Sept. 12, 1961 J. J. DUANE Erm. 2,999,265
SATURATED PAD FOR CLEANSING AND DEonoRIzING Filed Sept. 23. 195'? li-yf- SEA/ ED A BSO/PBE/vr /DAD INVENTORS. JEROME JD uA NE Q? Ro THVB. Z2 @No Ff? United States Patent() p 2,999,265 SATURATED PAD FR CLEANSING AND DEGDGRIZING Jerome J. Duane, Westport, Conn., and Dorothy B.
Tarnoff, New York, NX., assignors, by mesne assignments, to Dorothy B. TarnoE, New York, N.Y.
Filed Sept. 23, 1957, Ser. No. 685,601 4 Claims. (Cl. 'l5-506) This invention relates to a product useful in feminine hygiene for cleansing and deodorizing and more particularly to a pad saturated with liquid and useful by females after eliminations to achieve a high order of personal cleanliness by removing malodorous products and detritus which remain on the body surface, while avoiding irritation of sensitive skin tissue.
Toilet tissue to cleanse the external pelvic region after urination or other eliminau'on is irritating to the skin and frequently ineifective to obtain cleanliness. Washing with soap and water this area of the body after elimination, is frequently inconvenient, if not a practical irnpossibility because facilities like a bidet for so doing may not be available at the desired time or place.
It is among the objects of the present invention to provide a readily disposable pad saturated with a cleansing and deodorizing composition, hermetically sealed in a container and of a size to be carried, for example, in a ladys handbag, which pad when applied directly after removal from 'the hermetically-sealed container without moistening, to the female pelvic region, particularly the vulval and anal areas, gives eiiicient cleansing and deod'onizing action and this without irritating the skin areas `to which it is applied.
Other objects and advantages of this invention will be apparent from the following detailed description thereof taken in connection with the accompanying drawing which shows for illustrative purposes a preferred embodimen't of the invention.
In this drawing:
' FIG. 1 is a perspective View of a preferred embodi- `rnent of this invention, several of the layers forming the hermetically sealed container being broken away to show the interior structure of the container and the absorbent pad sealed therein; and
FIG. 2 is a vertical section through the product of FIG. 1 taken in a plane indicated by line 2--2 on FIG. 1.
Referring to the drawing, indicates a product comprising a hermetically-sealed container -11 and a pad 12 saturated with a cleansing and deodorizing composition hereinafter described, so that the pad 12 is completely dampened. The absorbent pad may contain from 2 to 6 times its dry weight of aqueous composition. In the case of an absorbent non-woven cotton pad, about 5 times its dry weight of composition usually produces an excellent product.
The hermetically-sealed container desirably is made by superimposing two laminated sheets, one above the other to form a rectangular envelope sealed on three sides leaving the fourth side open. Each laminated sheet consists of an outer protective layer 13', for example cellulose acetate or paper; an intermediate vaportight and opaque layer 14, e.g. metal foil such as aluminum foil; and an inner layer or lining 15 of chemically inert material, e.g. Plioiihn or Saran. Each of the layers 13, 14 and 15 are iilms, e.g. have an individual thickness of approximately 0.008 to v0.0l0inch. Desirably,
the inner layer is heat sealable, 'and the sheets forming the laminate are bonded together so that the sealing of the inner layers to each other forms a hermetically sealed container. Instead of forming the container by placing two laminated sheets in contact with each other as shown in FIG. 1 and heat-sealing the resultant structure along three marginal edges leaving the fourth open, a single laminated sheet may be folded along its transverse median and two marginal edges intersecting the fold line heat-sealed to form a container open along the remaining marginal edge.
In one manner of producing the hygienic product of this invention, the pad is inserted in the container through the open end, the liquid composition then introduced into the container so that it is absorbed by the pad and the open side of the container sealed to produce a hermetically-sealed container having the saturated pad therein. Alternatively, the pad may be impregnated or saturated with the composition lthe saturated pad inserted in the container and the open side sealed. Still another method is to place saturated pads between two sheets of laminate constructed as hereinbefore described and heat-sealing the marginal edges of the two sheets in superimposed relation to form a hermetically-sealed container with the saturated pad therein. l
The absorbent pad is of non-irritating, non-linting fibrous material which disintegrates readily so that it is easily disposable. It may be either woven or nonwoven, preferably the latter, because non-woven materials disintegrate more readily than woven materials. Suitable are the fabrics used Ifor pharmaceutical or surgery purposes, such as the non-woven bleached cotton of soft annel-like texture known as Webril (manufactured by Kendall Mills), or high quality high tensile strength absorbent paper, preferably unsized and which readily disintegrates when flushed with Water. Absorbent fibrous material having a dry thickness of from about 0.025 to 0.075 inch performs satisfactorily. While it is preferred to make the pad of an approximately reotangular shape, say 3 by 5 inches in width and length, it will be understood the pad may be suitably dimensioned as desired. Also, the pads may be folded one or more times to reduce the size of the nal product; such pads may be removed from the container and unfolded partially or completely for use.
The aqueous composition with which the pad is impregnated should have a pH of from 5 to 6.5, contain at least 85% by Iweight of water, bacteriostatic agent, and a surface active agent which will not inactivate the bacteriostatic agent and is an ecient epidermal cleanser. This aqueous composition may also contain an emollient t0 prevent drying out of the skin and vto leave a pleasing, non-greasy softness to the skin. Preferably, but not neoessarily, the composition also contains a humectant to maintain a desired degree of dampness in the saturated pad, a substance such as menthol to leave a physical sensation of coolness upon :application of the saturated pad and a perfumery scent in a concentration to impart a pleasing odor upon opening of the container but not necessarily sufficient to impart any appreciable odor to the body iafter application of the pad. When using emulsions to impregnate the pad, the emulsions may contain a colloidal peptizing agent to stabilize same.
It is desirable to have the aqueous composition on the acid side of the neutral point; As indicated above, the pH of the composition should be within the range of from 5 to 6.5 to avoid the irritating laction of alkali upon delicate skin membranes and on ordinary skin tissue inthe case of soap susceptible individuals. By excluding alkaline soap from the composition, the pH of the composition is maintained within the desired range. To insure having the pH of the composition within the range stated, smallyamounts of non-toxic or innocuous acidic substances such as orthophosphoric acid, citric acid, rstearic acid, gluconic acid, acetic acid, lactic acid or potassium acid tartrate may be incorporated therein. By maintaining the pH within the range given above, the bacterio- 3 static action of the bacteriostatic agents hcreinafter disclosed i's enhanced as compared with their action in an alkaline environment.
rIlhe bacteriostatic agent employed is a chlorinated phenol such as any of the following. or a mixture thereof (a) Hexachlorophene which is 2,2.-methylene bis (3,4,6- tichlorophenol) (la) Bithionol which is 2,2.-thio bis (,4,6dichlorophenol) (c) D.C.M.X. which is 2,4dichfloro3,5xylenol (d) 2,2'ethylidene bis (3,4,6-trichlorophenol) These compounds inhibit the growth and reproduction of' transient microorganisms present on skin surfaces 'which microorganisms are believed to be responsible for the putrefaction of certain odorous portions of normal perspiration, giving rise to noticeable body odor. They "are sufficiently odorless in themselves that they do not 'cause the user to be aware of an objectionable medicinal odor when applied in accordance with the present invention. When so applied, they are absorbed or retainedv on the skin and hair so that the desired bacteriosftaticaction is maintained during the period between applications. Moreover, when applied in accordance with the present invention, they do not irritate' the delicate tissue to Iwhich they are applied and are nontoxic even'- though amorbed through the skin surfacel or abrasions thereon and used repeatedly. v`The concentration of these bacteriostatic agents found suitable for use in the impregnating composition isv in the range' of 0.1 to 2% of the weight of the composition, preferably 0.1 to 1%. Preferred range of concentrations for hexachlotophene is 0.1 -to 0.4%; for' bithionol it is from 0.2 to 1%. It is particularly preferred to use an amount near thev upper portion of the ranges given, to avoid a possible lowering in activity of the bacteriostatic vagent when the product of the invention is' used to Ycounteract odors arising from exceptionally thigh level of proteinaceous menses.
As thev neutral surface active Iag'ent, itis preferred to employ anionic or non-ionic surface active agents which are non-imitating to the skin and will not react and thus inactivate the bacteriostatic agent. Preferred classes of Ianionicsurface active agents are:
(l) Salts of sulfated straight chain saturated or unsaturated fatty alcohols containing from. 8 to 18 carbon atoms, such as: i
' (a) Sodium lauryl sul-fate (b) Ammoniumlauryl sulfate (c)- Sodium oleyl sulfate l (2) Salts of sulfated branched chain aliphatic alcohols,
` such as:
. (d) The sodium sulfate of 7-methyl-undecanol-4 (3) Salts of the reaction product of fatty acyl chlorides with sarcosine, such as:
(e) Sodium lauroyl sarcosinate .(4) Salts of the sulfated mono'glycerides of straight chain saturated or unsaturated fatty acids, such as:
(f) Sodium myristyl monoglyceryl sulfate (5) Salts of the isethionic esters of saturated or unsaturated fatty aoids, such as;
(g) Sodium lauryl isethionate v (h) Sodium oleyl isethion-ate (6) Salts of sulfoacetic esters of saturated or unsaturated fatty alcohols, such as:
Y (i) Sodium ylauryl sulfoacetate (7) Salts of polyalkyl esters of aliphatic` polycarboxyl sulfonic acids, such as:
(j) Sodiumdioctyl sulfosuccinate H (k) Sodium trihexyl sulfotricarballylate (8) Salts of sulfated poflyoxyethylene ethers of alkyl phenols, such as:
(l) Sodium octyl phenoxyethoxyethyl ether sulfonate Examples of non-ionic surface active agents whichmay be used along with` the anionic surface active agents hereinbefore enumerated or alone are as follows: Polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monostearate, octyl phenoxy polyether ethanol, and nonyl phenoxy polyether ethanol.
These surface active agents when used in accordance with this invention, promote the easy removal of soil, stains, malodorous products and other detritus from the skin and hair without unnecessary rubbing. Moreover, they assist in the emulsiiication and stabilization of the bacteriostatic agentv and emollient oils (described hereinafter), in the emulsion. Surprisingly, the combination of anionic and non-ionic surface active agents acts synergistically in that their detergency and the emulsiiiability of the bacteriostatic agent and emollient oils is greater than the sum of the results of the individual surface active agents alone at the same concentration.
The concentration of' surface active agent is within the range of 0.05 to 2% of the total weight of the emulsion, preferably 0.1t'o 0.5% for each surface active agent used, Where more than one is used. By using a mixture of non .ionic md anionic surface active agents, each in amount Within the range above given (0.1 to 0.5%), foaming is mitigated and any possible defatting action on the skin tissue is minimized. Moreover, by using an amount of surface active agent Within this range, the amount of nonvolatile residue left on the slin after application of the product of this invention is sufliciently small to be non-objectionable. y
The emollient employed is a non-rancidifying fatty oil or aliphatic fatty alcohol having from 12 to 18 carbon atoms or a multisterol of lanolin or derivatives of these. Examples of such emollient are: isopropyl myrist'ate-palmitate (Deltyl Extra), lanolin sterols (Amerchol L 101), acetylated lanolin (Modulen), acetylated distilled monoglycerides (Myvacet) and cetyl alcohol. These emollients act 'to prevent or relieve defatting of the skin tissue brought about by the surface active agents, to leave a pleasing non-greasy softness to the skin and give physical Irelief from itching.
The emollients are employed in a concentration of from 1 `to 10% byweight, preferably 2 to 8% by weight based on the weight of the emulsion. Instead of the individual emollients listed above, a mixture thereof may be used, the amount of the mixture falling within the concentration range hereinabove given.
Examples of humectants which may be employed, if it is desired to-incorpor-ate same in the impregnating composition, are propylene glycol, glycerine, sorbitol and diethylene glycol. They are added to maintain a desired degree of dampness in the pad should the hermetically sealed container be opened accidentally. Propylene glycol also serves as afgood solvent for the bacteriostatic agent andemollient and being water-soluble aids infemulsifying these constituents. The humectants are desir-ably employed within the range of 1 to 15%, preferably '2. to
Colloidal peptizing agents which can be used are: carboxymethyl cellulose, methyl cellulose, polyvinyl pyrrolidone, magnesium aluminum silicate, polyacrylic acid and amine stearates. They aidy in smulsifying the water-insoluble compounds and stabilize the emulsion against separating or creaming on storage. They are used in a concentration of 0.1 to 10%, preferably 0.2 to 5% by weight. The more viscous peptizing agents are preferably used in smaller amounts within the range above given.
If methanol is incorporated, it is employed in an amount o'f from 0.02 to 0.5%, preferably 0.05 to 0.3% by weight. Onlyr a fraction of a percent of a perfumery scent' may be incorporated in the emulsion. The amount used' should `be such as to give a noticeable odor to the pad upon opening the hermetically-sealed container but not. such as to remain on the skin for any great length of time after application.
The constituents of the impregnating composition may be mixed'at' any temperature'below the boiling point of lwater and at or above room temperature.' It is prefer- -able to form a solution containing the bacteriostatic agent -and the emollients in a suitable solvent at a temperature -of from 35 to 90 C. and to this solution add a solution containing the surface active agent, peptizing agent, if used, While agitating and at approximately the same tern- .perature The resultant emulsion desirably is passed 'through a colloid'mill or other means of reducing the .particle size of the internal dispersed phase.
The following examples are given for purposes of illusltrau'ng the invention. It will be understood the inven- 4tion is not limited to these examples. In the following `examples the materials used are of high purity; the baclteriostatic agent and the emollient used are of USP grade; `the water used is distilled water. All parts are given on `a weight basis.
Example I A solution is prepared by dissolving 0.3 part of hexachlorophene, 3 parts isopropyl myristate, 0.1 part of rmenthol, by warming to 40-45 C. and then added while :stirring to a mixture containing 0.5 part of magnesium :aluminum silicate (Veegum), 0.2 part of polyoxy-ethylene :sorbitan monooleate (Tween 80) and 25 parts of water :also at 40 45 C. After mixing for from 2 to 5 minutes, f0.2 part of lavender oil is added. The resultant emulsion is passed through a colloid mill to form a stable emulsion. This emulsion is then diluted with a solution containing 0.2 part of sodium lauryl sulfate and 70.5 parts of water. To this emulsion 0.02 part of citric acid is added so that it has a pH within the range of 5.5 to 6.0. 9
-grams of this emulsion is applied to a pad of unwoven cotton fabric 3" x 5" in dimension weighing on the average 1 gram. The pad is thus completely dampened.
The pad is hermetically sealed in a container of the type shown in the drawing to form the product ready for use when desired by simply opening the container.
Example Il 5 parts of propylene glycol, 0.5 part of sodium octyl phenoxyethoxy ethyl ether sulfonate (Triton X-200), 0.5 part of Veegum and 89.0 parts of water are heated to 85 C. and then `added to a mixture of 0.3 part of bithionol, 4 parts of lanolin multisterols (Amerchol L-101) and 0.5 part of stearic acid also at 85 C. This resulting suspension is agitated until the temperature falls to 45 C. and then 0.2 part of the perfumcry scent is added and the mixture stirred until it reaches room temperature. The emulsion is incorporated in a pad and the saturated pad in a hermetically-sealed container as described above 1in connection with Example I.
Example Ill 0.3 part of hexachlorophene is dissolved in l5 parts fof propylene glycol. This solution is added while stir- Jing to a solution containing 0.5 part of methyl cellulose, 0.2 part of polyoxyethylene sorbitan monostearate (Tween 60), 84 parts of Water and one drop of a floral perfumery scent. The resultant dispersion is poured on small fabric pads each Weighing on the average of 2.2 grs. so that the average weight take-up of each pad is 5.6 grs. Each pad is then heat-sealed inside a container such as shown in the drawings and described above.
Example IV A solution of propylene glycol containing 0.3 part of hexachlorophene, l0 parts of propylene glycol and 0.2 part of lanolin is added to a mixture of 0.3 part sodium lauryl sulfate, 0|.5 part of polyvinyl pyrrolidone and 88.7 parts of water while stirring to produce an emulsion. The emulsion is employed to impregnate pads and the impregnated pads are each sealed in a container as described in the preceding examples.
Example V In this example, 0.3 part of hexachlorophene is dissolved in 2.5 parts of isopropyl myristate fwhile agitating and heating to 40 C. This solution is poured into an aqueous solution consisting of 0.5v partof Veegum, 005 part of sodium lauryl sulfate and 15 parts of water. The emulsion formed is passed through a colloid mill and thereafter diluted ywith 79.4 parts of water containing 0.?. part of sodium lauryl sulfate and 0.05 pant of a lavender perfume. This emulsion is soaked into a nonwoven cotton fabric (Webril-R) and excess liquid expressed therefrom leaving a residual liquid of about 5 times the dry Weight of the fabric. The damp pads are then packaged into hermetically-sealed containers of the type shown in the drawings and hereinabove described.
Example VI Melt the following ingredients and heat mixturel to Parts D.C.M.X 0.2 Amerchol L-101 f 6.0 Modulan 2.0 Stearic acid 2.0 Glyceryl monostearate 2.0
Dissolve 0.15 part of 4-chloro-3,5dimethyl phenol in a mixture of lanolin multisterol, 1.0 part cetyl alcohol, 1.0 part, and polyoxyethylene sorbitan monostearate, 0.5 part, by raising the temperature to 70 C. Add to this, While stirring vigorously, a solution of 1 part glycerin, 0.25 part sodium lauroyl isethionate in 25 parts of Water, also at the same temperature. After 5 minutes add 71 parts of Water at room temperature and 0.1 part of perfumery oil, and stabilize by passing this y dispersion through a colloid mill. The resultant emulsion is employed to impregnate the pads and then the impregnated pads are each sealed in a container as described in the preceding examples.
Example VIII A solution is made, at 85 C., of 0.25 part of hexachlorophene, 4.0 parts of lanolin multisterole, 2.0 parts of acetylated lanolin, 2.0 parts of stearic acid, 6.0 parts of neutral glyceryl monostearate, and 4.0 parts of petrolatum. To this mixture is added an aqueous solution also at 85 C. of 5.0 parts of glycerine, 0.5 part of sodium octyl phenoxyethoxyethyl ether sulfonate and 76 parts of water. The resultant emulsion is stirred until the temperature falls to 45 C., then 0.25 part of perfume are added and stirring continued until room temperature is reached. The resultant emulsion is employed to impregnate the pads and then the impregnated pads are each sealed in a container as described in the preceding examples.
The substitution of other bacteriostatic agents, emollients and surface active agents disclosed herein for these respective constituents employed in the above examples can be made; the resultant emulsions are satisfactory for use in impregnating pads.
It will be noted that the present invention provides a hygienic product in the form of a readily disposable pad saturated with a cleansing and deodorizing composition hermetically sealed and of a size to be carried, for example, in a ladys handbag. The hermetically-sealed container can readily -be opened by a simple tearing orperation. If desired, it may be provided with a score line 'which facilitates the tearing of the container to give ready access to the saturated pad therein. The pad may be applied directly as it is removed from the container without moistening it by wiping, daubing or swabbing to the skin and hair' ofV the pelvic region and when thus applied gives efficient cleansing and deodorizing action andl this without irritation. On the contrary, it leaves a pleasing, cooling physical condition and leaves so litt-le residual liquid on the skin surface that no further drying by towel or paper is required. After use, the pad can be disposed of `by flushing away or in any other sanitary manner. AThus, the present invention makes available for the first time an article specically qualified to serve the function of the ybidet iixture, so v/idely -used throughout Europe and South America, and this in Aa manner whichy is simple, convenient, effective and inexpensive.
Our invention will be fully understood from the foren going embodiments `but it is to be understood that this invention is not restricted to the present disclosure.
What is claimed is:
1. A'cleansing and'deodorizing product'for cleansing and deodoriiing the 'female pelvic region comprising a readily disposable 'iibrous pad saturated with a liquid composition having a pH of from to 6.5, said composition containing at least 86% by weight of Water, from 0.1% to 2% by lweight of a hacteostatic agent and from 0.05% to 2% by Weight of a surface active agent which will not inactivate the bacteriostatic yagent and which composition, when applied to the female pelvic region, is not injurious thereto and will not leave any deposits thereon. g
2. A cleansing and dcodorizing product as deiined in claim l, in which the bacteriostatic Iagent is from the group consistingv of hexachlorophene, bithionol, 2,4-
idiomas-miami, zanahyndene bis (3M-nieuw claim 2, in which the surface active yagent is polyoxy ethylene sonbitan monolaur'a'te. f
4. A. cleansing and deodorizing product for cleansing aud deodorizing the female pelvic region, comprising a readily disposable iibrous pad saturated with a liquid composition having a pH of from 5 to V6.5 out containing substantially no ffreeV liquid, said composition containing about by weight of water, from 0.1% to 2% by weight of bacterios'tatic agent, from 0.5% to 2% by weight of a non-ionic sunface active agent which will not inactivate the lbacteriostatic agent, and not greater than 0.3%- by Weight of menthol, which composition, when applied to the female pelvic region, is not injurious thereto, does not leave any deposits thereon, and leiects cleansing thereof without requiring a rinsing or drying treatment.
References Cited in the tile'of this patent UNITED STATES PATENTS OTHER REFERENCES Soap and Sanitary Chemicals, January 1951, pages 38- 4l and 11S-#119'.
Citas de patentes